Atrioventricular Nodal Reentry Tachycardia (AVNRT) is a type of abnormal heart rhythm characterized by a rapid heartbeat originating from the atrioventricular (AV) node. The AV node is a specialized tissue located between the upper and lower chambers of the heart, which controls the electrical signals between these chambers.
During AVNRT, there is an abnormal electrical pathway within the AV node that causes the signals to travel in a loop. This loop results in a rapid heartbeat, usually ranging from 150 to 250 beats per minute. AVNRT is a paroxysmal condition, meaning it occurs suddenly and intermittently.
Individuals with AVNRT may experience symptoms such as a racing or pounding heartbeat, palpitations, shortness of breath, light-headedness, chest discomfort, or fainting. These symptoms may resolve on their own or via interventions such as vagal maneuvers (such as coughing or bearing down) or medication.
AVNRT is typically diagnosed using an electrocardiogram (ECG) test during an episode or with the help of a Holter monitor, which records the heart's electrical activity over an extended period. Once diagnosed, treatment options include lifestyle modifications, medications to control heart rate or restore normal rhythm, as well as procedures to eliminate the abnormal electrical pathway.
It is crucial for individuals experiencing symptoms or diagnosed with AVNRT to consult with a healthcare professional specialized in cardiology for proper evaluation, management, and monitoring.
